Coring device



April 28, 1925.

o. w. DICKERSON CORING DEVICE Filed April 22, 1922 2 Sheets-Sheet 1 naw/km El .W.Di1:Ker5 n11 April 28, 1925.

O. W; DICKERSON CORING DEVICE Filed April 22, 1922 2 Sheets-Sheet 2 u/rum 3f guuowboz ELW- DiEKEPE an Patented Apr. 28, 1925. I

UNITED. STATES 1,535,297 PATENT OFF-ICE.

ORMAN W. DICKERSON, 01F OKLAHOMA CITY, OKLAHOMA.

COR-ING DEVICE.

I Application filed April 22, 1922. Serial No. 556,044.

To all whom it may concern:

Be it known that I, ORMAN lV. DICKER- I SON, a citizen of'the United States, residing at Oklahoma City, in the county of Oklahoma and State of Oklahoma, have invented certain new and useful Improvements in Goring Devices, of which the following is a specification, reference being had to the accompanylng drawlngs.

This lnvention relates to improvements in coring devices, and more particulary to coring devices for use in connection with the drill stems of rotary well drilling outfits.

An important object of the invention is to provide in a device of this character means whereby the coring device may be inserted through the drill tube and and shoe to the operating position and locked in position so that it may be employed for coring:

As at present employed with these drilling machines, when it is necessary to employ the coring device, it is first necessary to withdraw the entire drill tube consisting of.

coup-led sections of pipe, remove from the lower end thereof the drill and replace the same with the coring device and reinsert the tube in the bore. These operations not only take considerable time and require the services of a number of men but it is also necessary in order to permit'of the With drawal of the tube without entirely disjointing the same to provide a very high derrick, a much higher derrick'than would be necessary in the ordinary operation of the operating position.

machine were this withdrawal unnecessary.

Accordingly, an important object of this i11 vention becomes to provide. a coring device.

for employment in conjunction with a drill shoe having withdrawable blades, such as disclosed in my co-pending application, Serial No. 550,830 filed April 8th, 1922,'of

which this application is a continuation in part, which coring device when the drill bits are withdrawn may be inserted and used in conjunction withthecdrill shoe of the drill bits without the necessity of withdrawing the drill tube and shoe. J

A further object of the'in'vention is to provide novel and improved means for locking the coring device to the shoeagainst both vertical and rotary motion with respect thereto when the same has arrived at the ,A still further object of the invention is to provide a device of this character having means whereby the water within the bore. of

machine, not shown.

the well is b-y-passed to prevent its interference wlth the lower or elevation of the coring device.

These and other objects I attain by the construct-ion and arrangement shown in the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein like reference characters designate like parts throughout.

In the drawings: I

Figure 1 is a side elevation of a coring device constructed in accordance with my invention showing the same in position With- Q is a sectional view of the drill hanger taken at right angles to one another; Figures 10 and 11 are sections taken on the 5, lines 10-10 and 11 11 of Figure 9, re-

spectively; and

Figure 12 is a plan View of the support.

Referring now more particularly to the drawings, the numeral 10 indicates atubular drill shoe having formed in the side walls thereof at the bottom, blade receiving openings 11 which are oppositely directed. Within the shoe adjacent the openings the wall of the .shoe is thickened to reduce the bore thereof to the size of the blade receiving openings, as at 12, the upper surface of this enlargement being inclined downwardly to the edge of the blade receiving opening, as

indicated at 13. The'upper wall the blade receiving opening is inclined upwardly toward the "interior of the shoe, as indicated at 14. The upper end of the shoe is threaded, as at 15, for engagement-with adriv'e pipe 16 to be operated from a rotary drilling the shoe adjacent the upper end thereof is provided with a pair of oppositely inclined grooves 17 each extending about ap-proximately a quarter of the circumference of the interior of the shoe and'having their ad- The interior wall of jacent ends overlapping, as shown. The lower walls of these grooves are abrupt, as at 18, and the upper walls inclined, as at 19. Each of the grooves is provided at its lower end with a downwardly extending vertical branch 20, the lower wall of which inclines, as indicated at 21. The purpose of the grooves 17 and of the peculiar construction thereof will hereinafter appear.

The numeral 24 indicates a combined support and coring device mount consisting of an elongated body portion circular in cross section and provided adjacent the upper end thereof on its exterior surface with a packing groove 25 for the reception of a packing element for engagement against the walls of the bore of the shoe or drill tube. The support 24 is provided at its lower end with flattened side portions26 adapted to engage intermediate the thickened portions of the shoe and have a substantial fit therewith. In the lower face ofthis flattened portion which will project below the lower end of the shoe when the support is in its lowermost position, a threaded recess 27 is formed for the reception of a coring pipe 28. The body of the support is provided with a longitudinal bore 29 preferably irregular in cross section and in this bore is slidably mounted a hanger member 30 adapted at its upper end, as at 31, for engagement with a cable shackle.

The hanger member 30 is provided in a side face thereof with a groove 32 which terminates short of the lower end thereof and in which operates a stop member 33 securedto the support 24. This groove permits of vertical movement of the hanger 30 within the bore 29 but prevents its complete withdrawal therefrom. The hanger member 30 is provided with a longitudinal bore 34 provided with inlet branches 35 at its upper end opening through both sides of the hanger member and at its lower endwith outlet branches 36 opening through opposite sides of the hanger.

Formed in the body of the'support 24 at substantially diametrically opposed points are slots 37 and within these slots are pivotally mounted at the upperends of the slots, the upper ends of the shanks 38 of blind blades 39. The blades are of such size that they may be withdrawn entirely within the body of the support 24 so that the same may be lowered within the drill tube and shoe with which it has a substantial fit and that when projected they will not extend beyond the outer race of the drill shoe a sufficient distance to engage against the wall of the casing. The outer surface of the blade proper outwardly of the shanks 38 has an inclined face 40 which coacts with the inclined upper wall 14 of the blade receiving openings of the shoe. I refer to these blades as blind blades for the reason that they are constructed as and have the appearance of blades but in reality perform no cutting operation whatever, simply serving the joint purpose of locking the core cutting carrier against vertical movement and of delivering water thereto, as will hereinafter more fully appear.

. It will be seen that if the support is lowered into the bore with the blades 39 aligned with the openings 11 of the shoe, the blades being held to one side of their center of gravity by the confining walls of the shoe when aligned with the openings, will swing outwardly into the same. It will likewise be obvious that if the blades are locked in this limit the downward movement of the sup port, moves downwardly within the support forcing the blades outwardly to fully extended position and preventing their withdrawal within the support until the hanger is again elevated by a pull on the cable attached thereto, not herein illustrated. \Vhen the hanger is elevated, the blades may be swung inwardly by an upward pull on the carrier, as the inclined faces 40 thereof working against the inclined faces of the upper ends of the blade receiving openings will wedge these blades into the carrier.

When the hanger 30 is in its lowermost position, the inlet openings 35 of the bore 34 thereof are disposed just above the upper end of the support 24 and accordingly fluid may enter therein to pass 34. The blades 39 are provided with passages 42 which, when the hanger is in the lowermost position, have their entrance ends which are formed in their inner faces, aligned with the outlets 36 from the bore 34 and accordingly receive this fluid and direct it through their outlet ends which are preferably formed in the lower faces of the blades thus directing the stream downwardly about the coring device.

When the device is beingelevated or lowered within the bore and the weight of the support is carried by the hanger, the hanger will be arranged with the lower end of the slot 32 abutting the stop member 33. Vhen in this position the outlets 36 thereof are arranged in alignment with the slots 37 and accordingly water may pass through these outlets, the inlets 35 and bore 34 to by-pass through the bore to assure of the proper alignment of the blades 39 with the blade receiving openings 11, the support 24 is provided upon its outer Surface at diametrically opposed points with spring pressed buttons or lugs 43. As the hanger with the support, 24 mounted thereon is lowered into the bore, one of these buttons when arriving at the grooves 17 will align with oneof the grooves and cause rotation of the hanger by its engagement therewith, and more particularly against the abrupt lower wall 18 thereof. This rotation terminates upon arrival of the engaged button at the vertical branch of the groove by means of which the button escapes from the groove passing out at the inclined wall at the lower end thereof. At the time of such escape the blades 39 are aligned with and partially enter in the space between the thickened portions 12 at the lower end of the shoe and are accordingly in position to enter their respective openings 11. Continuation of the lowering movement will cause engagement of the inclined shoulder 41 of the support stopping the downward movement ofthe support, as hereinbefore stated and the lowering of the hanger 30 will force the blades fully outwardly into the openings.

In .the operation of the device the drill shoe 1.0 is secured to the lower end of the tubnlar drill stock 16 in the usual manner and the assembledhanger 30, and support '21 with.

the blades is placed in the bore of the drill stock 16 and dropped therethrough. During the downward movement of the assembly 'prior to the arrival of the blades'39 at the openings 11, one of the spring pressed buttons 43 comes into engagement with one of the grooves 17, as herembefore stated, rotating the device and aligning the blades. Fur

ther downward n'iovement causes the engage- 'ment of the shoulder 41 and stopping of the terfere with the movement thereof.

In withdrawing the tool,'the lnltial movement of the hanger releases the blades to permit them-to move inwardlyand when the stop 33-.of the support is engaged by the end of the groove 32 of the hanger, the hanger is drawn upwardly causing the blades 39 to be wedged inwardly by the eoaction of their inclined upper faces 40 with the inclined upper faces of the openings 11 and collapsed within the carrier so that they may be with drawn through the bore of the shoe and of the drill stock. b

It will be obvious that a coring device constructed in accordance with the foregoing may be employed with the hanger and withdrawn therefrom at any. time it is so desired and may be replaced by the blade support and blades of the rotary umlerreaming drill described in my co-pending application hereinbefore mentioned. It'will likewise be obvious that this provision for interchangeability of the coring and drilling devices will result in a substantial saving of time and materials in the boring of the well and will furthermore reduce the number of operatives necessary for attendance to the drilling apparatus. It will furthermore be obvious that many changes are possible in the construction as hereinbefore set forth, and I accordingly do not limit myself to such specific construction except as hereinafter claimed.

I claim:

In a coring device for rotary drills, the combination with a drill shoe having a bore and provided in its lower end with a restricted outlet opening and in its side walls with bladerecciving openings, of a support shiftable within the bore and having a reduced lower end adapted to engage in said outlet opening, said lower end being adapted for engagement with a coring tool, blind blades carried by the support, a hanger for the support and .shiftable within the support, the shifting of said hanger within the support in one directiiin forcing said blades outwardly for engagement in' the blade receiving openings of the shoe, said hanger being providedwith a longitudinal bore having an insignature. I J

Y ORMAN IV. DICKERSON.

let extending through the wall of the hanger, 

